alter column values in mysql code example

Example 1: add column in mysq

ALTER TABLE Table_name
ADD Email varchar(255);

Example 2: update all rows mysql

UPDATE tableName SET columnName = yourValue;
#to update multiple columns:
UPDATE tableName SET column1 = value1, column2 = value2; #and so on

Example 3: mysql add columns

ALTER TABLE table
ADD [COLUMN] column_name_1 column_1_definition [FIRST|AFTER existing_column],
ADD [COLUMN] column_name_2 column_2_definition [FIRST|AFTER existing_column],
...
;